Spiral tube double-row type heat exchanger for electric vehicle heat management system

Abstract

The invention discloses a spiral pipe double-row type heat exchanger for an electric vehicle heat management system. The spiral pipe double-row type heat exchanger comprises a heat exchanger core assembly, a heat exchanger shell, a collector plate, a liquid outlet pipe connector, a liquid inlet pipe connector, a first end cover, a second end cover, a first cavity, a second cavity and a flow guide plate. The heat exchanger core assembly is provided with a spiral pipe assembly and a spiral pipe positioning plate. The spiral pipe assembly is provided with a second inner spiral pipe, a spiral pipe supporting pipe, a third inner spiral pipe and a first spiral pipe. The spiral tube double-row type heat exchanger for the electric vehicle heat management system is provided with two paths of cooling fluid three-layer heat exchange runners, namely a fluid tube pass loop I and a fluid tube pass loop II; and two paths of refrigerant fluid loops, namely a refrigerant shell pass loop I and a refrigerant shell pass loop II, are also arranged. The product has the working characteristics of large output flow, high heat exchange efficiency, good sealing performance, safety and reliability, and is particularly suitable for an electric vehicle thermal management system with higher requirements on modularization, light weight and integration.

Description

Technical Field

[0001] The invention belongs to the technical field of electric vehicle devices and accessories, and in particular relates to a spiral tube double-row heat exchanger used in a thermal management system of an electric vehicle. Background Art

[0002] With the rapid development of the new energy vehicle industry, especially the electric vehicle smart cockpit and power battery pack cooling system and the electric drive module cooling system, the dynamic performance requirements for the electric vehicle thermal management system are getting higher and higher. The heat exchanger is a key component in the electric vehicle thermal management system, and its performance significantly affects the efficiency of the electric vehicle thermal management system. The spiral tube double-row heat exchanger has large flow, high heat exchange efficiency, good sealing, safe and reliable working characteristics. It is one of the energy-saving, safe and environmentally friendly high-tech electric vehicle thermal management system devices; the spiral tube double-row heat exchanger has a compact structure, is easy to assemble and maintain, and has a high degree of integration; the spiral tube double-row heat exchanger is the best choice for electric vehicle thermal management systems for pure electric vehicles (EVs) and hybrid electric vehicles (HEVs).

[0003] For early heat exchangers, on the one hand, traditional air-cooled heat exchangers have high noise, low output power, and low heat exchange efficiency; on the other hand, they mostly use fin-type heat exchanger designs, which have large space and volume, and are not conducive to the development of electric vehicle thermal management systems towards modularization, lightweight, and integration. In current technical applications, the cooling system of the electric vehicle's smart cockpit and power battery pack and the cooling system of the electric drive module need to match multiple plate-type liquid-cooled heat exchangers, which increases the complexity of the heat exchanger pipelines and increases the failure coefficient of the electric vehicle thermal management system; the plate-type liquid-cooled heat exchanger has poor component compatibility and high manufacturing costs. Therefore, how to provide a long-term use, simple assembly process and lower cost, using a multi-circuit spiral tube double-row heat exchanger has a broader market prospect. Summary of the invention

[0004] In view of the problems caused by the above heat exchangers, the purpose of the present invention is to provide a spiral tube double-row heat exchanger for an electric vehicle thermal management system, which can meet the structural strength of the spiral tube double-row heat exchanger and the modular and integrated design requirements of the thermal management system, while achieving lower energy consumption, high heat exchange efficiency, low noise, and large flow rate continuous and stable output of the spiral tube double-row heat exchanger, thereby ensuring the efficient operation of the electric vehicle thermal management system.

[0005] The spiral tube double-row heat exchanger for the thermal management system of an electric vehicle comprises a heat exchanger core assembly, a heat exchanger shell, a collecting plate, a liquid outlet pipe joint, a liquid inlet pipe joint, an end cover 1, an end cover 2, a cavity 1, a cavity 2, and a guide plate; the heat exchanger core assembly is provided with a spiral tube assembly and a spiral tube positioning plate; wherein the spiral tube assembly is provided with an inner spiral tube 2, a spiral tube support tube, an inner spiral tube 3, and a spiral tube 1; the assembled spiral tube assembly is arranged in sequence and assembled inside the two cavities of the heat exchanger shell through the spiral tube positioning plate, and two collecting plates are respectively installed on the end faces of the two sides of the cavity of the heat exchanger shell; the end cover 1 and the end cover 2 are respectively assembled on the four collecting plates in sequence, and the end cover 2 is located on the collecting plate at the same end face position of the cavity 2 provided on the heat exchanger shell, End cover 1 is located on the collecting plate at the same end face position of cavity 1 provided on the heat exchanger shell, inner spiral tube 2, inner spiral tube 3, spiral tube 1 and collecting plate are sealed by brazing welding, end cover 1, end cover 2 are fixed to the collecting plate and heat exchanger shell by welding sealing; cavity 1 and cavity 2 are respectively fixed to the refrigerant inlet pipe joint and the refrigerant outlet pipe joint by welding sealing, the upper part of the top outer plane of end cover 1 is assembled and connected to a liquid inlet pipe joint, and the lower part of the top outer plane of end cover 2 is assembled and connected to two liquid outlet pipe joints; cover plates symmetrical to the refrigerant inlet pipe joint and the refrigerant outlet pipe joint are assembled and connected on both side end faces of the heat exchanger shell, and the cover plates are also fixed to the heat exchanger shell by welding sealing, and four shock-absorbing pad assemblies are pressed on the base of the heat exchanger shell.

[0006] The spiral tube double-row heat exchanger used in the thermal management system of an electric vehicle is provided with two cooling fluids (such as water, a mixture of water and ethylene glycol, or insulating heat transfer oil) and three-layer heat exchange channels, which refer to fluid tube-side loop one and fluid tube-side loop two; it is also provided with two refrigerant fluid (such as R134a, R1234yf, or R744) loops, which refer to refrigerant shell-side loop one and refrigerant shell-side loop two. The fluid tube-side loop one is configured as a cooling fluid three-layer heat exchange channel consisting of a liquid inlet pipe joint, an end cover one and a water baffle plate mounted thereon, a collecting plate, a heat exchanger core assembly, an end cover two and a water baffle plate mounted thereon, and a liquid outlet pipe joint; similarly, the fluid tube-side loop two is also configured as a cooling fluid three-layer heat exchange channel consisting of a liquid inlet pipe joint, an end cover one and a water baffle plate mounted thereon, a collecting plate, a heat exchanger core assembly, an end cover two and a water baffle plate mounted thereon, and a liquid outlet pipe joint; the refrigerant shell-side loop The first is a refrigerant fluid circuit consisting of a refrigerant inlet pipe joint, a heat exchanger shell and a refrigerant inlet hole 2 provided thereon, a guide plate, a heat exchanger shell and a refrigerant outlet hole 2 provided thereon, a collecting plate, a cover plate, and a refrigerant outlet pipe joint; the second refrigerant shell side circuit is a refrigerant fluid circuit consisting of a refrigerant inlet pipe joint, a heat exchanger shell and a refrigerant inlet hole 1 provided thereon, a guide plate, a heat exchanger shell and a refrigerant outlet hole 1 provided thereon, a collecting plate, a cover plate, and a refrigerant outlet pipe joint. The mechanism is simple and compact, has good compatibility, is easy to assemble, and is convenient to maintain.

[0007] The above technical problems of the present invention are solved by the following technical solutions:

[0008] A spiral tube double-row heat exchanger for an electric vehicle thermal management system, characterized in that it includes: a cover plate, a right-angle bent edge, an air avoidance groove, a reserved screw hole, a liquid inlet pipe joint, an end cover one, a fluid pipe side circuit one, an end cover two, a water baffle, a liquid outlet pipe joint, a cavity one, a fluid pipe side circuit two, a cavity two, a heat exchanger shell, a guide plate, a triangular error-proofing groove, a U-shaped error-proofing groove, a guide plate flow hole one, a guide plate flow hole two, a refrigerant outlet pipe joint, a collecting plate, a refrigerant inlet hole one, a refrigerant inlet hole two, a refrigerant outlet hole one, a refrigerant outlet hole two, a heat exchanger core assembly, a spiral tube positioning plate, a limit hole, a spiral tube assembly, a spiral tube one, an inner spiral tube two, a spiral tube support tube, an inner spiral tube three, a refrigerant inlet pipe joint, a refrigerant shell side circuit one, a refrigerant shell side circuit two, a spiral tube one positioning hole, and a shock-absorbing pad assembly.

[0009] The spiral tube assembly is provided with the spiral tube one, the inner spiral tube two, the spiral tube support tube, and the inner spiral tube three; the spiral tube support tube is provided with an equidistant linear array of through holes, the two inner spiral tubes two are symmetrically mounted on the outer circumference of the spiral tube support tube, and then the inner circular cavity of the spiral tube one is mounted on the outer circumference of the inner spiral tube two, and the inner spiral tube three is assembled inside the circular cavity of the spiral tube support tube through transition fit; the assembly of the components of the spiral tube assembly is completed.

[0010] The heat exchanger core assembly is provided with the spiral tube assembly and the spiral tube positioning plate; the spiral tube positioning plate is provided with the spiral tube positioning hole, the limit hole, and the right-angle bent edge; the guide plate is provided with a triangular boss and a U-shaped boss that match the triangular anti-error groove and the U-shaped anti-error groove, and the guide plate is also provided with the guide plate flow hole 1 and the guide plate flow hole 2. The number of through holes provided in the guide plate flow hole 1 ranges from 6 holes to 22 holes, the number of through holes provided in the guide plate flow hole 2 ranges from 2 holes to 12 holes, and the number of holes in the guide plate flow hole 2 ranges from 1 hole to 22 holes. The diameter is set to 0.5 times the diameter of the guide plate flow hole 1, and the hole shapes of the guide plate flow hole 1 and the guide plate flow hole 2 include circular holes, rectangular holes, polygonal holes, elliptical holes, and U-shaped holes; the spiral tube positioning plates are respectively assembled at both ends of the assembled spiral tube assembly, so that the inner spiral tube 2 and the spiral tube support tube are buckled at the corresponding positions inside the hole groove of the limiting hole, and the spiral tube 1 is assembled inside the hole of the spiral tube 1 positioning hole. The number of spiral tube assemblies assembled with each pair of spiral tube positioning plates ranges from 3 to 6; the heat exchanger shell is provided with The air avoidance groove, the refrigerant inlet hole 1, the refrigerant inlet hole 2, the refrigerant outlet hole 1, the refrigerant outlet hole 2, the triangular error-proofing groove, the U-shaped error-proofing groove, the top outer plane of the heat exchanger shell is provided with the reserved screw holes, and the two side end faces of the heat exchanger shell are respectively provided with the cavity 1 and the cavity 2, the cavity 1 is internally assembled and connected to the refrigerant inlet pipe joint, and the cavity 2 is internally assembled and connected to the refrigerant outlet pipe joint; the collecting plate is provided with corresponding spiral tube 1, the inner spiral tube 2, and the inner spiral tube 3 passing through through holes for use; the spiral tube positioning plate together with the components thereon are arranged and assembled in sequence inside the two cavities of the heat exchanger shell, the guide plate is pressed into the cavity of the heat exchanger shell by aligning the triangular boss and U-shaped boss provided on the guide plate with the triangular anti-error groove and the U-shaped anti-error groove, two collecting plates are assembled on each of the two side end faces of the heat exchanger shell cavity, the spiral tube one, the inner spiral tube two, the inner spiral tube three and the collecting plate are sealed by brazing; the assembly of the heat exchanger core assembly, the heat exchanger shell and the collecting plate is completed.

[0011] The lower part of the top outer plane of the end cover 2 is assembled and connected with the two liquid outlet pipe joints, and the liquid outlet pipe joints and the end cover 2 are sealed and fixed by welding. A water baffle is assembled inside the cavity of the end cover 2, and the upper part of the top outer plane of the end cover 1 is assembled and connected with the liquid inlet pipe joint, and the liquid inlet pipe joint and the end cover 1 are sealed and fixed by welding. A water baffle is also assembled inside the cavity of the end cover 1; the end cover 1 and the end cover 2 are assembled on the four collecting plates in sequence, and the end cover 2 is located at the position provided on the heat exchanger shell. The end cover one is located on the collecting plate at the same end face position of the cavity two. Similarly, the end cover one is located on the collecting plate at the same end face position of the cavity one provided on the heat exchanger shell. The end cover one, the end cover two, the collecting plate and the heat exchanger shell are fixed by welding and sealing. The cover plates which are symmetrical to the refrigerant inlet pipe joint and the refrigerant outlet pipe joint are respectively assembled and connected on the end faces of both sides of the heat exchanger shell. The cover plates and the heat exchanger shell are also fixed by welding and sealing. Four shock-absorbing pad assemblies are pressed on the base of the heat exchanger shell.

[0012] A spiral tube double-row heat exchanger for an electric vehicle thermal management system is provided with two cooling fluid (such as water, a mixture of water and ethylene glycol or insulating heat transfer oil) three-layer heat exchange flow channels, which refer to the fluid pipe-side loop one and the fluid pipe-side loop two; it is also provided with two refrigerant fluid (such as R134a, R1234yf or R744) loops, which refer to the refrigerant shell-side loop one and the refrigerant shell-side loop two.

[0013] The fluid pipe loop 1 is configured as a three-layer heat exchange flow channel for cooling fluid consisting of the liquid inlet pipe joint, the end cover 1 and the water baffle plate mounted thereon, the collecting plate, the heat exchanger core assembly, the end cover 2 and the water baffle plate mounted thereon, and the liquid outlet pipe joint;

[0014] The fluid pipe loop 2 is also configured as a cooling fluid three-layer heat exchange flow channel consisting of the liquid inlet pipe joint, the end cover 1 and the water baffle plate mounted thereon, the collecting plate, the heat exchanger core assembly, the end cover 2 and the water baffle plate mounted thereon, and the liquid outlet pipe joint;

[0015] The refrigerant shell side circuit 1 is set as a refrigerant fluid circuit consisting of the refrigerant inlet pipe joint, the heat exchanger shell and the refrigerant inlet hole 2 provided thereon, the guide plate, the heat exchanger shell and the refrigerant outlet hole 2 provided thereon, the collecting plate, the cover plate, and the refrigerant outlet pipe joint;

[0016] The refrigerant shell side loop 2 is set as a refrigerant fluid loop consisting of the refrigerant inlet pipe joint, the heat exchanger shell and the refrigerant inlet hole 1 provided thereon, the guide plate, the heat exchanger shell and the refrigerant outlet hole 1 provided thereon, the collecting plate, the cover plate, and the refrigerant outlet pipe joint;

[0017] The fluid tube-side loop 1 and the refrigerant shell-side loop 1 form a closed-loop heat exchange loop, and the fluid tube-side loop 2 and the refrigerant shell-side loop 2 form another closed-loop heat exchange loop.

[0018] The present invention greatly reduces the number of matching heat exchangers and related components required in the thermal management system module. The design uses highly standardized components composed of extruded profiles, which is conducive to the development of the thermal management system in the direction of modularization and integration, and greatly reduces the cost of the thermal management system module.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. Innovative design of spiral tube multi-layer nested assembly structure, which has excellent anti-vibration performance. The spiral tube support tube adopts the technical solution of rigidly supporting the spiral tubes inside and outside, eliminating the fatigue damage caused by the flow impact of the cooling fluid and the vibration of the mechanism in the three-layer heat exchange flow channel; achieving low-noise continuous and stable operation of the spiral tube double-row heat exchanger;

[0021] 2. The novel spiral tube structure provided by the present invention is characterized in that, through the novel spiral tube structure design, the cooling fluid continuously undergoes spiral deflection during the flow along the pipe wall of the spiral tube, thereby forming a turbulent state. Fluids in different flow states in different parts participate in heat exchange, which greatly improves the heat transfer coefficient and the heat exchange efficiency of the spiral tube double-row heat exchanger;

[0022] 3. The spiral tube multi-layer nested structure design is adopted. Compared with the straight-through heat exchange tube of the same volume, the spiral tube significantly increases the length of the heat exchange tube, directly increases the heat exchange area, and further improves the heat exchange efficiency of the spiral tube double-row heat exchanger;

[0023] 4. The spiral tube assembly is a key component of the two-way cooling fluid three-layer heat exchange flow channel provided in the present invention. The spiral tube assembly is completely immersed in the two refrigerant fluid circuits provided. The design of the three-layer heat exchange flow channel enables the cooling fluid and the refrigerant fluid to achieve sufficient heat exchange, and also increases the time for the cooling fluid to participate in the heat exchange in the spiral tube, thereby further improving the heat exchange efficiency of the spiral tube double-row heat exchanger.

[0024] 5. The present invention only needs to change the axial length of the heat exchanger shell and the heat exchanger core assembly to easily obtain the heat exchange power parameters required for the spiral tube double-row heat exchanger, which greatly shortens the product development cycle, has good versatility of related parts, reduces the complexity of product assembly, and significantly improves the qualified rate of finished product assembly;

[0025] 6. The present invention greatly reduces the number of heat exchangers and related parts required to be configured in the thermal management system module, and the design adopts parts with good versatility and made of extruded profiles, which is conducive to significantly reducing the cost of the thermal management system module;

[0026] 7. The present invention uses the reserved screw holes and the heat exchanger housing as a carrier to assemble the electronic water pump, solenoid valve, kettle and other related parts of the thermal management system module, which is conducive to achieving high integration of the thermal management system module;

[0027] 8. The present invention has a compact structure, good sealing, high integration and low cost, and is particularly suitable for electric vehicle thermal management systems with higher requirements for modularization, lightness and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 It is a cross-sectional top view schematic diagram of the three-dimensional assembly structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall assembly structure of the present invention and the flow direction of the fluid pipe loop;

[0031] Figure 3 It is a top view of the overall assembly structure of the present invention and a schematic diagram of the second flow direction of the fluid pipe loop;

[0032] Figure 4 It is a front view of the overall assembly cross-section of the present invention and a flow diagram of the refrigerant shell-side circuit;

[0033] Figure 5 It is a front view of the overall assembly cross-section structure of the present invention and a schematic diagram of the second flow direction of the refrigerant shell-side circuit;

[0034] Figure 6 This is a schematic diagram of the assembly structure of the heat exchanger core assembly of the present invention;

[0035] Figure 7 This is a schematic diagram of the assembly structure of the spiral tube assembly of the present invention;

[0036] Figure 8It is a schematic diagram of the heat exchanger shell structure and the guide plate installation arrangement of the present invention;

[0037] Fig. 9 It is a schematic diagram of the hole arrangement of the heat exchanger shell structure and the refrigerant side shell circuit described in the present invention.

[0038] In the attached figure: 2. Cover plate; 5. Right-angle bend; 6. Air-avoiding groove; 8. Reserved screw holes; 9. Liquid inlet pipe joint; 10. End cover 1; 11. Fluid pipe loop 1; 12. End cover 2; 15. Water-blocking plate; 16. Liquid outlet pipe joint; 20. Cavity 1; 21. Fluid pipe loop 2; 30. Cavity 2; 40. Heat exchanger shell; 41. Guide plate; 42. Triangular anti-error groove; 43. U-shaped anti-error groove; 47. Guide plate flow hole 1; 48. Guide plate flow hole 2; 50. Refrigerant outlet pipe joint ; 60. Collecting plate; 66. Refrigerant inlet hole 1; 67. Refrigerant inlet hole 2; 68. Refrigerant outlet hole 1; 69. Refrigerant outlet hole 2; 70. Heat exchanger core assembly; 71. Spiral tube positioning plate; 73. Limiting hole; 75. Spiral tube assembly; 76. Spiral tube 1; 77. Inner spiral tube 2; 78. Spiral tube support tube; 79. Inner spiral tube 3; 80. Refrigerant inlet pipe joint; 81. Refrigerant shell-side loop 1; 82. Refrigerant shell-side loop 2; 85. Spiral tube 1 positioning hole; 90. Shock-absorbing pad assembly. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements and numerical values ​​of the components and steps described in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is in fact merely illustrative and is not intended to be any limitation to the present invention and its application or use. In all examples shown and discussed herein, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, no further discussion is required in subsequent drawings.

[0041] The terms "including", "having", "having", "having", "having", "having", "having", "having", "having", "having", "having", "having", "having", and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus including a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatuses;

[0042] In the description of the present invention, it should be understood that the terms "middle", "length", "upper", "lower", "side", "both sides", "axial", "circumference", "top", "closed loop", "loop", "flow channel", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; unless otherwise clearly specified and limited; in addition, the terms "installation", "assembly", "connection", "welding", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention discloses a spiral tube double-row heat exchanger for an electric vehicle thermal management system, comprising a cover plate 2, a right-angle bent edge 5, an air avoidance groove 6, a reserved screw hole 8, a liquid inlet pipe joint 9, an end cover 10, a fluid pipe loop 11, an end cover 2 12, a water baffle 15, a liquid outlet pipe joint 16, a cavity 1 20, a fluid pipe loop 2 21, a cavity 2 30, a heat exchanger shell 40, a guide plate 41, a triangular error-proofing groove 42, a U-shaped error-proofing groove 43, a guide plate flow hole 1 47, and a guide plate flow hole 2 48, refrigerant outlet pipe joint 50, collecting plate 60, refrigerant inlet hole one 66, refrigerant inlet hole two 67, refrigerant outlet hole one 68, refrigerant outlet hole two 69, heat exchanger core assembly 70, spiral tube positioning plate 71, limiting hole 73, spiral tube assembly 75, spiral tube one 76, inner spiral tube two 77, spiral tube support tube 78, inner spiral tube three 79, refrigerant inlet pipe joint 80, refrigerant shell side loop one 81, refrigerant shell side loop two 82, spiral tube one positioning hole 85, shock absorbing pad assembly 90.

[0044] The spiral tube assembly 75 shown in the drawings of the present invention is provided with a spiral tube 1 76, an inner spiral tube 2 77, a spiral tube support tube 78, and an inner spiral tube 3 79. The spiral tube support tube 78 is provided with through holes in an equidistant linear array; the heat exchanger core assembly 70 is provided with a spiral tube assembly 75 and a spiral tube positioning plate 71; the spiral tube positioning plate 71 is provided with a spiral tube 1 positioning hole 85, a limiting hole 73, and a right-angle bent edge 5; the number of spiral tube assemblies 75 assembled with each pair of spiral tube positioning plates 71 ranges from 3 to 6;

[0045] The guide plate 41 shown in the drawings of the present invention is provided with a triangular boss and a U-shaped boss that match the triangular anti-mistake groove 42 and the U-shaped anti-mistake groove 43. The guide plate 41 is also provided with a guide plate flow hole 1 47 and a guide plate flow hole 2 48. The number of through holes provided in the guide plate flow hole 1 47 ranges from 6 holes to 22 holes, and the number of through holes provided in the guide plate flow hole 2 48 ranges from 2 holes to 12 holes. The aperture of the guide plate flow hole 2 48 is set to 0.5 times the aperture of the guide plate flow hole 1 47. The hole shapes of the guide plate flow hole 1 47 and the guide plate flow hole 2 48 include circular holes, rectangular holes, polygonal holes, elliptical holes, and U-shaped holes.

[0046] The heat exchanger shell 40 shown in the drawings of the present invention is provided with an air avoidance groove 6, a refrigerant inlet hole 1 66, a refrigerant inlet hole 2 67, a refrigerant outlet hole 1 68, a refrigerant outlet hole 2 69, a triangular error-proofing groove 42, and a U-shaped error-proofing groove 43. A reserved screw hole 8 is provided on the top outer plane of the heat exchanger shell 40. A cavity 1 20 and a cavity 2 30 are respectively provided on the end faces on both sides of the heat exchanger shell 40. The cavity 1 20 is internally assembled with a refrigerant inlet pipe joint 80, and the cavity 2 30 is internally assembled with a refrigerant outlet pipe joint 50; the collecting plate 60 is provided with through holes for corresponding spiral tube 1 76, inner spiral tube 2 77, and inner spiral tube 3 79 to pass through;

[0047] The lower part of the top outer plane of the end cover 12 shown in the drawings of the present invention is assembled and connected with two liquid outlet pipe joints 16, and the liquid outlet pipe joints 16 and the end cover 12 are sealed and fixed by welding. A water-blocking plate 15 is assembled inside the cavity of the end cover 12. The upper part of the top outer plane of the end cover 10 is assembled and connected with a liquid inlet pipe joint 9, and the liquid inlet pipe joint 9 and the end cover 10 are sealed and fixed by welding. A water-blocking plate 15 is also assembled inside the cavity of the end cover 10.

[0048] A spiral tube double-row heat exchanger for an electric vehicle thermal management system shown in the attached drawings of the present invention is provided with two cooling fluids (such as water, a mixture of water and ethylene glycol, or insulating heat transfer oil) and three-layer heat exchange flow channels, namely, fluid tube-side loop 11 and fluid tube-side loop 21; and two refrigerant fluid (such as R134a, R1234yf or R744) loops, namely, refrigerant shell-side loop 1 81 and refrigerant shell-side loop 2 82.

[0049] The fluid pipe loop 11 is configured as a three-layer heat exchange flow channel for cooling fluid consisting of a liquid inlet pipe joint 9, an end cover 10 and a water baffle 15 mounted thereon, a collecting plate 60, a heat exchanger core assembly 70, an end cover 2 12 and a water baffle 15 mounted thereon, and a liquid outlet pipe joint 16;

[0050] The second fluid pipe loop 21 is also configured as a three-layer heat exchange channel for cooling fluid consisting of a liquid inlet pipe joint 9, an end cover 10 and a water baffle 15 mounted thereon, a current collecting plate 60, a heat exchanger core assembly 70, an end cover 2 12 and a water baffle 15 mounted thereon, and a liquid outlet pipe joint 16;

[0051] The refrigerant shell side loop 1 81 is set as a refrigerant fluid loop consisting of a refrigerant inlet pipe joint 80, a heat exchanger shell 40 and a refrigerant inlet hole 2 67 provided thereon, a guide plate 41, a heat exchanger shell 40 and a refrigerant outlet hole 2 69 provided thereon, a collecting plate 60, a cover plate 2, and a refrigerant outlet pipe joint 50;

[0052] The second refrigerant shell circuit 82 is configured as a refrigerant fluid circuit consisting of a refrigerant inlet pipe joint 80, a heat exchanger shell 40 and a refrigerant inlet hole 66 provided thereon, a guide plate 41, a heat exchanger shell 40 and a refrigerant outlet hole 68 provided thereon, a collecting plate 60, a cover plate 2, and a refrigerant outlet pipe joint 50;

[0053] The fluid tube-side loop 11 and the refrigerant shell-side loop 1 81 form a closed-loop heat exchange loop, and the fluid tube-side loop 2 21 and the refrigerant shell-side loop 2 82 form another closed-loop heat exchange loop.

[0054] Furthermore, the two inner spiral tubes 77 are symmetrically mounted on the outer circumference of the spiral tube support tube 78, and then the inner circular cavity of the spiral tube 1 76 is mounted on the outer circumference of the inner spiral tube 2 77, and the inner spiral tube 3 79 is assembled inside the circular cavity of the spiral tube support tube 78 through transition fit; thus completing the assembly of the components of the spiral tube assembly 75.

[0055] Furthermore, the spiral tube positioning plates 71 are respectively assembled at both ends of the assembled spiral tube assembly 75, so that the inner spiral tube 2 77 and the spiral tube support tube 78 are snapped into the corresponding positions inside the hole groove of the limiting hole 73, and the spiral tube 1 76 is assembled inside the hole of the spiral tube 1 positioning hole 85; the spiral tube positioning plate 71 and the components thereon are arranged in sequence and assembled inside the two cavities of the heat exchanger shell 40, and the guide plate 41 is pressed into the cavity of the heat exchanger shell 40 by aligning the triangular boss and U-shaped boss on the guide plate 41 with the triangular anti-error groove 42 and the U-shaped anti-error groove 43, and two collecting plates 60 are assembled on each side end face of the cavity of the heat exchanger shell 40, and the spiral tube 1 76, the inner spiral tube 2 77, the inner spiral tube 3 79 and the collecting plate 60 are sealed by brazing; the assembly of the heat exchanger core assembly 70 and the heat exchanger shell 40 and the collecting plate 60 is completed.

[0056] Furthermore, the end cover 10 and the end cover 2 12 are respectively assembled on the four collecting plates 60 in sequence. The end cover 2 12 is located on the collecting plate 60 at the same end surface position of the cavity 2 30 set on the heat exchanger shell 40, and the end cover 10 is located on the collecting plate 60 at the same end surface position of the cavity 1 20 set on the heat exchanger shell 40. The end cover 10, the end cover 2 12 and the collecting plate 60 and the heat exchanger shell 40 are sealed and fixed by welding; the cover plates 2 symmetrical to the refrigerant inlet pipe joint 80 and the refrigerant outlet pipe joint 50 are assembled and connected on the end surfaces of both sides of the heat exchanger shell 40, and the cover plate 2 and the heat exchanger shell 40 are also sealed and fixed by welding. Four shock-absorbing pad assemblies 90 are pressed on the base of the heat exchanger shell 40.

[0057] The design of the present invention adopts parts with a high degree of standardization and composed of extruded profiles, which have good compatibility and are easy to assemble, thereby reducing the complexity of product assembly and significantly improving the qualified rate of finished product assembly.

[0058] In addition to the above, although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention; the above embodiments may be modified without departing from the scope and spirit of the present invention, but any technical solution formed by equivalent substitution or equivalent transformation shall fall within the scope of protection required by the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A spiral tube double-row heat exchanger for an electric vehicle thermal management system, characterized in that: include: Cover plate, right-angle bent edge, air avoidance groove, reserved screw hole position, liquid inlet pipe joint, end cover 1, fluid pipe loop 1, end cover 2, baffle plate, liquid outlet pipe joint, cavity 1, fluid pipe loop 2, cavity 2, heat exchanger shell, guide plate, triangular error-proofing groove, U-shaped error-proofing groove, guide plate flow hole 1, guide plate flow hole 2, refrigerant outlet pipe joint, collecting plate, refrigerant inlet hole 1, refrigerant inlet hole 2, refrigerant outlet hole 1, refrigerant outlet hole 2, heat exchanger core assembly, spiral tube positioning plate, limit hole, spiral tube assembly, spiral tube 1, inner spiral tube 2, spiral tube support tube, inner spiral tube 3, refrigerant inlet pipe joint, refrigerant shell loop 1, refrigerant shell loop 2, spiral tube 1 positioning hole, shock-absorbing pad assembly; The heat exchanger core assembly is provided with the spiral tube assembly and the spiral tube positioning plate. The spiral tube positioning plate is provided with the spiral tube 1 positioning hole, the limiting hole, and the right-angle bent edge. The spiral tube assembly is provided with the spiral tube 1, the inner spiral tube 2, the spiral tube support tube, and the inner spiral tube 3. The spiral tube support tube is provided with through holes in an equidistant linear array. The number of spiral tube assemblies assembled by each pair of spiral tube positioning plates ranges from 3 to 6 pieces. The heat exchanger shell is provided with the air avoidance groove, the refrigerant inlet hole 1, the refrigerant inlet hole 2, the refrigerant outlet hole 1, the refrigerant outlet hole 2, the triangular anti-error groove, and the U-shaped anti-error groove. The top outer plane of the heat exchanger shell is provided with the reserved screw hole position. The two side end faces of the heat exchanger shell are respectively provided with the cavity 1 and the cavity 2. The guide plate is provided with a triangular boss and a U-shaped boss that match the triangular anti-error groove and the U-shaped anti-error groove. The guide plate is also provided with the guide plate flow hole 1 and the guide plate flow hole 2. The collecting plate is provided with through holes corresponding to the spiral tube 1, the inner spiral tube 2, and the inner spiral tube 3 for passing through; The lower part of the top outer plane of the end cover 2 is assembled and connected with the two liquid outlet pipe joints, and the liquid outlet pipe joints are fixed to the end cover 2 by welding and sealing. A water baffle is assembled inside the mold cavity of the end cover 2. The upper part of the top outer plane of the end cover 1 is assembled and connected with the liquid inlet pipe joint, and the liquid inlet pipe joint is fixed to the end cover 1 by welding and sealing. A water baffle is also assembled inside the mold cavity of the end cover 1. A spiral tube double-row heat exchanger for an electric vehicle thermal management system is provided with two cooling fluid three-layer heat exchange channels, namely the fluid tube-side loop 1 and the fluid tube-side loop 2; and is also provided with two refrigerant fluid loops, namely the refrigerant shell-side loop 1 and the refrigerant shell-side loop 2.

2. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The number of through holes provided in the guide plate flow hole 1 ranges from 6 holes to 22 holes, the number of through holes provided in the guide plate flow hole 2 ranges from 2 holes to 12 holes, the aperture of the guide plate flow hole 2 is set to 0.5 times the aperture of the guide plate flow hole 1, and the hole shapes of the guide plate flow hole 1 and the guide plate flow hole 2 include circular holes, rectangular holes, polygonal holes, elliptical holes, and U-shaped holes.

3. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The two inner spiral tubes 2 are symmetrically sleeved on the outer circumference of the spiral tube support tube, the inner circular cavity of the spiral tube 1 is sleeved on the outer circumference of the inner spiral tube 2, and the inner spiral tube 3 is assembled inside the circular cavity of the spiral tube support tube through transition fit; the inner cavity of the cavity 1 is assembled and connected to the refrigerant inlet pipe joint, and the inner cavity of the cavity 2 is assembled and connected to the refrigerant outlet pipe joint; the spiral tube 1, the inner spiral tube 2, the inner spiral tube 3 and the collecting plate are sealed by brazing; the end cover 1, the end cover 2 are fixed to the collecting plate and the heat exchanger shell by welding and sealing; the cover plates symmetrical to the refrigerant inlet pipe joint and the refrigerant outlet pipe joint are assembled and connected on the end faces of both sides of the heat exchanger shell, and the cover plates and the heat exchanger shell are also fixed by welding and sealing, and four shock-absorbing pad assemblies are pressed on the base of the heat exchanger shell.

4. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The fluid pipe loop one is configured as a three-layer heat exchange flow channel for cooling fluid consisting of the liquid inlet pipe joint, the end cover one and the water baffle plate assembled thereon, the collecting plate, the heat exchanger core assembly, the end cover two and the water baffle plate assembled thereon, and the liquid outlet pipe joint.

5. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The fluid pipe loop two is also configured as a three-layer heat exchange channel for cooling fluid consisting of the liquid inlet pipe joint, the end cover one and the water baffle plate assembled thereon, the collecting plate, the heat exchanger core assembly, the end cover two and the water baffle plate assembled thereon, and the liquid outlet pipe joint.

6. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The refrigerant shell-side circuit 1 is configured as a refrigerant fluid circuit consisting of the refrigerant inlet pipe joint, the heat exchanger shell and the refrigerant inlet hole 2 provided thereon, the guide plate, the heat exchanger shell and the refrigerant outlet hole 2 provided thereon, the collecting plate, the cover plate, and the refrigerant outlet pipe joint.

7. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The refrigerant shell-side loop 2 is configured as a refrigerant fluid loop consisting of the refrigerant inlet pipe joint, the heat exchanger shell and the refrigerant inlet hole 1 provided thereon, the guide plate, the heat exchanger shell and the refrigerant outlet hole 1 provided thereon, the collecting plate, the cover plate, and the refrigerant outlet pipe joint.

8. The spiral tube double-row heat exchanger for an electric vehicle thermal management system according to claim 1, characterized in that: The fluid tube-side loop 1 and the refrigerant shell-side loop 1 form a closed-loop heat exchange loop, and the fluid tube-side loop 2 and the refrigerant shell-side loop 2 form another closed-loop heat exchange loop.

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